Monitoring display



t e m m n mln L n a s Ott mdm.. e enne r 0 0 C GLFL 2569 6666 9999 1111 00027 l 18000 0434 4,l,2,6, 6266 5035 0,224 3333 o, m `ua m W nu mm m e .wm To www ,PCw Ayme lnk J .wd m w IJUEE UYBN m 0 t n C V n 1 d 7 .l

d n a n O e d r m e a mS a S K. n Eb mtv, .wd wl w .mm m ak im Wem an rc .mmm rt PA Nutley, New Jersey a corporation of New Jersey. by mesne assignments [54] MONITQRING DISPLA'Y 9 Claims, 2 Drawing Figs.

[52] U.S. 12S/2.05, 73/402 [5l] A61b5/02 [50] FieldofSearch.........................................l28/2.05(AS), 2.05(D),2.05(M),2.05(MS), 2.05(SPH); ll6/(Inquired); 73/389, 401, 402; 340/244 systolic pe nearest the viewer aque portion of the first tape of the dingly changes the high systolic alarm of the inner tape to change the viewathe inner tape of the same one color MoNrroRING DISPLAY BACKGROUND oF THE INVENTION This invention relates to a monitoring display in a sphygmomanometer for providing visual indication of the high and low systolic pressure alarm'settings as selected by an attendant. i i

Automatic apparatus capableof measuring blood pressure (sphygmomanometends particular importance in hospital operating rooms, hospital intensive care wards and in many experimental fields of medicine.. Such an automatic apparatus should be one that can set off an alarm when the systolic blood pressure level is above vor below, certain limits. A sphygmomanometer should alsozprovide a display that gives a visual indication of the selectedhigh and selected low systolic pressure level alarm setting andl which is readily seen when viewing the monitoring unit. There are several desirable requirements for thistype of system. First, it is desirable that the monitoring display match with the manometer scale which is a traditional part of the system and as such provides a display to which physicians, nurses and other .attendants are accustomed;`

secondly, it is desirable that the display immediately describe the permissible systolic pressures and the dangerous systolic pressures'thirdly, the display must tie in with the alarm potentiometer settings of the high'and low systolic pressure alarm whereby the settings of thepotentiometer cooperating with the monitoring display electrically deterrnine'when the alarm signal must be made; and fourthly, it is desirable that a reliable correlation of the actual pressure is indicated by the height of the mercury inthe manometer tube and the limit set is indicated by the crossoverbtwe'en the permissible and the dangerous regions of the visible indicator.

It is an object of this invention-to provide a` monitoring dis4 play which provides a visual indication of the highand the low systolic pressure alarm settings alongside a manometer tube wherein the monitoring display matches the manometer scale and the alarm potentiometer setting cooperates with the monitoring display. i

BRIEF DESCRIFTIONQF THE INVENTION In accordance with the `present invention a monitoring display for the settings ofthe high and low systolic blood pressure alarm levels of a'sphygrnornanometer i is provided which includes two movably mounted' tapes with one of the tapes mounted forward of the second tape with respect to the viewable side ofthe display and with both tapes alined alongside the manometer tube of a sphygmomanometer. The outer of the two tapes has a transparerrtportion and an opaque portion. ,This forward tape is orientedand driven so' that the viewable DESCRIPTION OF A FREFERRED EMBODIMENT The above-mentioned and other features and objects of this invention will become more apparent from the following description taken in connection with theaccompanying drawing in which: V

FIG. 1 is a sketch of a sphygmomanometer showing the viewable portion o f the monitoring display means described in accordance with a preferred embodiment of this invention;

and

FIG. 2 is a sketch of the monitoring display means in ac cordance with a preferred embodiment of this invention.

Referring to FIG. l, there is shown a sphygmomanometer (a blood pressure monitor) 10 having on its front face a manometer tube `l1 anda monitoring display `13. Along thc length of the manometer tube" 1I there are located pressure readings wherein the heightof the mercury in the tube indicates the pressure level both applied to the tube and around the limb of the human body (not shown). Thehigh systolic alarm light indicator 15` is illuminated and other alarm indicators such as a bell (not shown)` are activated when the patients detected` systolic blood Pressure is above a given selected reading. The low systolic indicator light I7 is illuminated and other alarm indicators such as a bell (not shown) are activated when the patients detected systolic blood pressure is below a certain selected .reading The patients systolic blood pressure is norrnallydetermined, for example, by the placement of an inflatable cuff about the brachial artery (upper arm) and sufficient pressure is applied to the cuff to occlude the artery. As the pressure to the cuff rises, correspondingly the heightof the mercury in the tube l1 rises. After the artery is occluded', sci that no blood flows therethrough, the pressure is gradually drained off by a bleeder valve (not shown) to a point where it is detected that the blood begins to flow or the Korotkoff sound is detected. When this condition is determined,'this indicates the systolic point of the patients blood pressure. If this condition is detected when the pressure level in the tube and the cuff is above the high systolic alarm setting, the alarm indicator l5 will be illuminated and an alarm bell (not shown) will be energized to notify the attendant. If this condition is detected when the pressure level in the tube and the cuff is below the setting of the low systolic alarm, the low'systolic alarm light 17 is illuminated and. Athe `low systolicalarrn bell (not shown) is activated to 'warn the attendant.

In accordance with this invention, a monitoring display I3 is provided which isiparticularly adaptable for use with the manometer tube ll, the viewable portion of which is shown in FIG. 1 alongside the manometer tube 11. Display 13 is shown in more detail in FIG. 2. The monitoring display 13 includes two endlesstap'es 18 and 19,having`apertures 20 and 2l respectively therein adapted to receive a sprocket. The first or outer tape 18 has, for example, a red opaque portion 22 marked R and a transparent portion 23. The transparent portion 23 is oriented generally `inthe forward centerviewing area at the front face of 'the sphygmomanometer 10 and rellates to the permissible systolic region. The red opaque portion 22 marked R is oriented mostly near the ends of the viewing area and relates to the'danger'ous systolic region. The outer tape `18 is driven by a driver wheel 25 located near the top of the display 13. The driverwheel 25 has sprockets 24 thereon which extend through the apertures 20 when the tape is in place to move the tape to a desired position. The outer wheel 26 freely rotatable on its supporting shaft, Knob 14 on the front panel is coupled to a worm and gear mechanism including a worm 28 and gear 29 lthrough shaft 30. Knob 14 is likewise coupled through shaft 30 to a potentiometer 32. Gear 29 is coupled to driver wheel 25 by means of a common shaft 31. As the shaft 30 is rotated by knob 14 to move drive wheel 25 and the tape 18, the `setting of potentiometer 32 is changed to thereby change the setting of'the alarm level of the high systolic pressure alarm. The second or inner tape 19 is mounted inside the outer tape 18. The center-viewing portion 36 of the second tape is, for example, green opaque marked G which relates generally to the permissible systolic region. lThe opaque portion 35 marked `R of the tape 19 substantially on the opposite `side from the center-'viewing area is red opaque and relates generally to .the dangerous systolic region. The

Atape 19 has apertures 37 therein and is driven by sprockets 39 on the driver wheel 38. Wheel 40 freely movable on its support shaft acts as the idler wheel to 'control the belt I9. Knob 1 6 on the front panel is coupled through shaft 42 to worm 43. Worm 43 is meshed with gear 45 with the gear 45 being coupled by shaft 46 to driver wheel 38. Knob 16 is likewise coupled by shaft 42 to potentiometer 47. Potentiometer 47 selects the alarm level of the low systolic alarm.

1n operation, by the turning of knob 14, the outer belt 18 is turned so asto move more or less of the red opaque portion, dangerous systolic` region ofbelt 18 near the top of the display 13 over the grerenyopaque portion of tape 19, correspondingly changing the alarm setting` of the high systolic alarm by the setting of the potentiometer 32. rThe V-shaped crossover border near thetop of the display 1,3 between the red opaque portion or dangerous region and the green background seen through the transparent portion of tape 18 indicative of the permissive region .is aliried apprbximately with the corresponding level tnhevrneru'ry'in the manometer tube must be when ythe highsystlic alarm willbegin to be energized and all pressure levels above this point will likewise provide an ala'rm. Similarly, wheny knob .loon driver' wheel 38 is `turned causing tape 19 to move and provide a more or less red opaque area to be viewed near the bottom of the display 13, a corresponding change inthe low systolic alarm setting is provided by the changing of the settingpf ioteritiorneter 47. The V-shaped crossover border near ,theubottom of the display 13 between the red opaque or 'dangero'i'is'` region 35 marked R and the green opaque portion marked G or permissible region 36 of the tape 19 is alined approximately with the corresponding level the mercury in the manometer tube inust be when the low systolic alarm will begin lto be energized and all pressure levels below this level likewise provide an alarm.

In the above-described piefe'rrrexi embodiment, red opaque and green opaque tapedare. dfscribed. lt is obvious that, without departirigfrom the spirit of this invention other color tapes may be used arid/or thevsecond tape may have a screen green in `color mounted behind both tapes to give an indication of the permissible region.

1 A high and low Lsystolic;l blood ypressure alarm level-monitoririg display for use in aisphygmom'anometer having a manometer tube wherein the height of the mercury in the tube indicates by markings along said tubethe blood pressure of a patient being inoi'iitgjred,` comprising:

a first and seend tape with'the viewing area of said tapes being oriented alongside said manometer tube and said pressure level markings, said first tape having an opaque portion and awtranspa'rent portion wherein one of said portions relates to thepermissible systolic region and the other portionirelates to the dangerous region and wherein only one crossoverbetween thepermissible transparent regionand the dangerous region is within the viewable areaofsaid tape;

means'ffor driving'said first tape with said first tape being arranged so that said cro's'soverof said first tape is alined with the pressure level Vmarking along the manometer tube which corresponds with the then selected one of the systolic alarm levels;' 4

said second tape having one portion the nature of which differs from the other portion wherein one of said portions of said second tape relates to the permissible systolic region and the other relates to the rdangerous region and wherein only one crossover between the different regions of the second tape is within the viewable area of said second tape through saidytransparent portion of said first tape;

means for driving said second tapel with said second tape being arranged so that said viewable crossover of said second tape' is alined with vthefpressure level marking alongy the manometer tube which'corresponds to the then selected other one of said systolic alarm levels.

y2. Th'e combination as claimed in claim 1 wherein said one of the selected alarm levels is said high systolic blood pressure alarm level and wherein said other one of said systolic alarm levels is said low systolic blood pressure alarm level.

3. The combination as claimed in claim 2 wherein said n opaque portion of said first tape is red opaque and wherein one of said portions of said second tape is likewise red opaque.

4. The combination as claimedin claim 3 wherein there is provided a green opaque screen behind said second tape and lthe different portion of said second tape .is trans arent. l

5. The combination as claimed in claim 3 w erein said difand second potentiometeLsaid first potentiometer determin ing the high systolic alarm setting and said second potentiometer determining said lou/"systolic alarm setting and wherein the means for driving said first tape is coupled to said first potentiometer and wherein the means for driving said second tape is coupled to said second potentiometer.

8. The combination as claimed in claim '7 wherein said means for driving said first tape includes a worm and gear mechanism and wherein said means for driving said second f tape includes a worm and gear mechanism.

9. The combination as claimed in claim 7 wherein said first 1 and second tapes are endless belt tapes with said second tape l being positioned inside said firsttape so Athat the amount of said green `opaque and lof said red opaque portions of said second tape viewable through said transparent portion of said first tape is determined bythe-setting of said driving means.

P04050 UNITED STATES PATENT OFFICE 559 CERTIFICATE 0F CORRECTION Parent No. 3,545,451 Dated December 8, 1970 Inventor( s) Frank and Wollmeri nger It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

The serial number listedwngllg should be Column 1+, line 15 in claim 1 "alined" should be aligned Signed and sealed this lith day of August 1971.

(SEAL) Attest:

WILLIAM E. SCHUYLER, JR.

EDWARD M.FLETCHER,JR. Attesting Officer Commissioner of Patents 

